Revenki's photos with the keyword: slider

All of the aluminum parts, sanded and buffed and ready to be solvent wiped prior to painting.

After spraying with aluminum primer. The parts will be satin black to minimize reflections, but the primer was only available in white

Limit switch brackets, the last pieces I (think I) needed to cut for the motion control slider, ready to prime and paint. (Oops - not quite ready, as the brackets for the tailstock caused an interference and had to be cut down a bit.)

A test assembly of the in-work motion control dolly. Not everything is bolted down tightly yet, this was just to see if it would all go together, and when it did, if it would run. And run it did. Took a little more power to drive the carriage than I thought it would, but the motor shield on the Arduino didn't even get noticeably above room temperature (unlike the other one whose bridge I burned out with no load on the motor -- oops). The Delrin coupling seems to be a tiny bit off-centered, but it's just a fit-up problem -- close enough to proceed with finishing the assorted aluminum bits and wiring up the limit switches.